1. This study examined the effects of altering nitric oxide levels with sodium nitroprusside or L-arginine in rat hearts stored hypothermically. 2. Hearts were microperfused at 4 °C for 24 h with a modified Krebs–Henseleit buffer (KHB) that contained either sodium nitroprusside, L-arginine, L-arginine methyl ester or dexamethasone. 3. After hypothermic storage, hearts were rewarmed to 37 °C wit...

For more than a century, the power system has been an amazing balancing act—how much electricity is generated to be exactly how consumed. This quite unique situation. Most other complex systems—natural or man-made—have buffers built in: rivers can have reservoirs; supply chain systems warehouses; and gas tanks. These decouple flows make operation flexible, fluctuations contained in local areas....

Most current computer architectures use a high−speed cache to translate user virtual addresses into physical memory addresses. On machines that require software to implement cache fills and invalidations, the software task is fairly straightforward. In a multi−processor multi−cache configuration, however, where processes are allowed to migrate across processors, there is an inherant synchroniza...

Automated storage and retrieval systems are warehousing systems that are used for the storage and retrieval of products in both distribution and production environments. Shuttle based storage/retrieval systems are composed of elevators with lifting tables that are attached on a mast, shuttle carriers, buffer positions and the storage racks. It is observed that the shuttle based storage/retrieva...

Database management systems (DBMSs) use a main memory area as a buffer to reduce the number of disk accesses performed by a transaction. Some DBMSs divide the buffer area into a number of independent buffer pools and each database object (table or index) is assigned to a specific buffer pool. The tasks of configuring the buffer pools, which define the mapping of database objects to buffer pools...

Archibald [1] analyzed the performance of a squeeze film between various geometrical configurations. Later on Wu [2, 3] investigated a squeeze film behavior for mainly, two types of geometries namely, annular and rectangular. Prakash and Viz [4] developed some aspects of the analysis incorporated in Wu [2, 3] and obtained the load carrying capacity ultimately leading to time height relation for...

“Time travel” in the storage system is accessing past storage system states. Legacy application programs could run transparently over the past states if the past states were virtualized in a form that makes them look like the current state. There are many levels in the storage system at which past state virtualization could occur. How do we choose? We think that past state virtualization should...

Adequate storage of polymorphonuclear leukocytes would allow an easier in vitro study of their structure and their functions, an easier study of polymorphonuclear leukocyte diseases (e.g. chronic granulomatous disease) and an easier use of polymorphonuclear leukocytes as a clinical tool (e.g. for localizing infections). Unfortunately, polymorphonuclear leukocytes are nearly impossible to preser...